Anterior subperiosteal implant



FIG. 1 is a perspective view of an anterior subperiosteal implantembodying the present design;

FIG. 2 is a front elevational view of the anterior subperiosteal implantshown in FIG. 1;

FIG. 3 is an elevational view of the side of the _anterior subperiostealimplant opposite the side shown in FIG. 1;

FIG. 4 is a rear elevational view; and

FIG. 5 is a top plan view.

The ornamental design for an anterior subperiosteal implant,substantially as shown.